Hand grip exerciser



FIG. 1 is a perspective view.

FIG. 2 is a bottom view.

FIG. 3 is a top view.

FIG. 4 is a left side view.

FIG. 5 is a right side view.

FIG. 6 is a rear view; and,

FIG. 7 is a front view. 

The ornamental design for a hand grip exerciser, as shown. 